Effect of Labyrinth Oil-Gas Separator Structure for High-Intensified Diesel Engine

SU Xinpeng; JING Guoxi; SUN Xiuxiu; YU Huichao; ZHAO Weicheng; WEN Yang

Vehicle Engine ›› 2023, Vol. 0 ›› Issue (5) : 57-62.

SU Xinpeng^1,2,JING Guoxi^1,2,SUN Xiuxiu^1,2,YU Huichao³,ZHAO Weicheng³,WEN Yang⁴

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Abstract

The labyrinth oil-gas separator is the main equipment of oil and gas pre-separation for heavy-duty diesel engine that directly affects the legislation conformation of engine emission. Based on CFD simulation, the influence of the main structural parameters of labyrinth oilgas separator including the pore size and spacing of filter orifice plate and number of filter orifice on pressure drop and separation efficiency were studied under the high blow-by gas conditions. Then the experiments were conducted to verify pressure drop and separation efficiency of different separators on the engine test bed. The results show that the greatest influence on the pressure drop and the separation efficiency under the high blowby gas conditions is the pore size of filter orifice plate and the number of filter orifice respectively for the labyrinth oil-gas separator with the staggered orifice plate. Besides, it is found that the design of labyrinth oilgas separator should focus on the opening rate of orifice plate.

Key words

oil-gas separator / heavy-duty diesel engine / structural design / separation efficiency / pressure drop

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SU Xinpeng,JING Guoxi,SUN Xiuxiu,YU Huichao,ZHAO Weicheng,WEN Yang. Effect of Labyrinth Oil-Gas Separator Structure for High-Intensified Diesel Engine[J]. Vehicle Engine. 2023, 0(5): 57-62